1 files changed, 20 insertions, 3 deletions
diff --git a/src/mongo/s/stale_exception.h b/src/mongo/s/stale_exception.h
index d82b18bab52..1778fe689a4 100644
--- a/src/mongo/s/stale_exception.h
+++ b/src/mongo/s/stale_exception.h
@@ -75,7 +75,7 @@ public:
     void serialize(BSONObjBuilder* bob) const;
     static std::shared_ptr<const ErrorExtraInfo> parse(const BSONObj& obj);
 
-protected:
+private:
     NamespaceString _nss;
     ChunkVersion _received;
     boost::optional<ChunkVersion> _wanted;
@@ -85,24 +85,41 @@ protected:
     boost::optional<SharedSemiFuture<void>> _criticalSectionSignal;
 };
 
+// TODO (SERVER-74380): Rename the StaleEpoch code to StaleDownstreamRouter and the info to
+// StaleDownstreamRouterInfo
 class StaleEpochInfo final : public ErrorExtraInfo {
 public:
     static constexpr auto code = ErrorCodes::StaleEpoch;
 
+    StaleEpochInfo(NamespaceString nss, ChunkVersion received, ChunkVersion wanted)
+        : _nss(std::move(nss)), _received(received), _wanted(wanted) {}
+
+    // TODO (SERVER-74380): Remove this constructor
     StaleEpochInfo(NamespaceString nss) : _nss(std::move(nss)) {}
 
     const auto& getNss() const {
         return _nss;
     }
 
+    const auto& getVersionReceived() const {
+        return _received;
+    }
+
+    const auto& getVersionWanted() const {
+        return _wanted;
+    }
+
     void serialize(BSONObjBuilder* bob) const;
     static std::shared_ptr<const ErrorExtraInfo> parse(const BSONObj& obj);
 
 private:
     NamespaceString _nss;
-};
 
-using StaleConfigException = ExceptionFor<ErrorCodes::StaleConfig>;
+    // TODO (SERVER-74380): These two fields are boost::optional for backwards compatibility. Either
+    // both of them are boost::none or both are set.
+    boost::optional<ChunkVersion> _received;
+    boost::optional<ChunkVersion> _wanted;
+};
 
 class StaleDbRoutingVersion final : public ErrorExtraInfo {
 public: